Improvement in feeding devices for sawing-machines



mv. GREEN R11 sAwxNcf MAQHINE UNITED STATES LUTHER W. GREEN, OF WILLIAMSPORT, PENNSYLVANIA.

IMPROVEMENT IN FEEDING DEVICES FOR SAWlNG-MACHINES.

Specification forming part of Letters Patent No. 118,448, dated August 29, 1871.

To all whom zt may concern:

Be it known that I, LUTHER W. GREEN, of the city of Williamsport, in the county of Lycoming and State of Pennsylvania, have invented a new and Improved Vertical and Circular Re- Sawing-Machine, of which the following is a speciiication:

My invention consists in so operatin g upon the lumber that there is no strain upon the saw, from the fact that the b'inding lis entirely avoided 5 and my machine is so constructed, having a positive movement, that the center can be always and easily obtained.

Figure 1 is a front view of my machine entire and ready for operation. Fig. 2 is a sectional view, exposing the parts below the feed-rolls particularly. Fig. 3 is a top view with feed-rolls and cross-heads, &c., removed.

A designates the entire frame-work of my ma chine, which frame is made of iron of suiiicient strength to maintain all the parts and resist the vibration caused by motion. On the frame A, from side to side, I put a solid iron plate, B, which is notched at either end and iirmly secured to the frame A by any desired means. The plate f has grooves in its entire length, as indicated by t, in which grooves the tongued cross-headsN N can move. An iron plate similar in all respects to the plate B is fastened to the frame behind the feed-rolls seen in the rear, and for the same purpose, viz., to accommodate a cross-head. In the center, and secured firmly to the frame, I place an iron rail with grooves in each side to afford a way for the inside of the cross-heads. This rail is shown sufficiently well for all practical purposes by a. The cross-heads are of simple and ordinary construction. On the crossheads N N I fasten the standards E E E E, provided with caps b b b( b at their tops to form the upper bearings for the feed-rolls C C, which have their lower bearings in proper arms placed beneath the cross-heads N N. It will be seen that I make use of four feed-rolls, each secured in similar manner to its own cross-head, and each cross-head moves in the grooves already mentioned by means of the tongue with which it is provided. It will also be seen that two small rolls, D D, are put above the standard-'caps of the large feed-rolls in the rear of the machine. These small rolls D D are intended for the purpose of working lumber of greater width, and are only called into requisition when boards are cut which are wider than can be held by the large rolls. To the standards E E I attach, by means of a pivot, the arms c o o o', to which arms, by a pivotal attachment, I connect the crooked levers G, which levers are also providedwith an additional crooked lever, e', attached bymeans of a short bar to the under side of two of the crooked levers G, and pivoted at M in the cross-head L. There are two of these crossheads L, and they slide up and down, as may be required, in the grooved plates 4 4. At the end of the levers e I attach weights of any required size, as shown by K K, which weights are grooved in the center and held by a set-screw or any other convenient means to the levers e e', and can be` moved either way for the purpose of increasing or diminishing the pressure of the feed-rolls. It will be observed that the levers G have slots in their ends, as shown at f', at which point they are attached to the cross-head L, and which slots allow free motion to the said cross-head. The grooved plates in which the cross-heads L move are rigidly connected to sliding plate T, which moves in the grooves W of the plate B, which plate B has grooves at its top to accommodate the cross-heads to which the feed-rolls are attached, as has been already described. To the levers Gr I fasten the arms shown by H, which arms pass through ears s, which ears are connected to the frame A for a bearing. The arms H are then connected to the sliding plate T by means of jamnuts h h and the lugs R, which lugs are fastened to sliding plate T. To this same sliding plate T is rigidly attached an arm, U, provided at its end with a screw-pad, X, into which screw-pad passes the screw operated by the hand-wheel Z outside of the frame A. It will be seen at once that by means of this arrangement I can readily move the plate T and all -of'the feed-rolls at any moment, and thus change at will the relative position of the rolls to the lumber, and cut from the board operated upon any required thickness by turning the hand-wheel Z. To the sliding plate T I also attach the stops P fastened at the upper end to one set of cross-heads, holding the feedrolls on one side, and attached by means of a bolt and slot to cross-head T. When it is required to cut a thin piece from a board the feed-rolls can be moved to any point desired by means of the screw or hand-wheel and the jam-nuts heretofore described, and then by turning the bolt rmly in the stop P one set of rolls is rigidly fixed,

and the levers of that side are detached from the standards E so that only one set of the rolls operates, and in this Way the board Will be perfectly uniform in its thickness, irrespective of the unequal thickness ofthe lumber from which it is taken. The levers F F are connected to the legs ofthe frame A, and are intended for the purpose of lifting the Weighted levers and separate the feed-rolls to admit the lumber, which, when placed between the feed-rolls, may be dropped, and the rolls at once embrace the lumber and pass it to the saW. To the under side of the feed-rolls I attach the ordinary bevel-gear and shafting and operate the machine by four simple described.

LUTHER W. GREEN.

Witnesses: Y WM. C. DOANE, F. READING. 

